ADU CITIES Contractor Directory

Ronquillo Custom Design Construction Company

● Active — license status verified against CSLB public data as of November 6, 2026

CSLB license#927682
ClassificationsB — General Building
Office of record6416 Amethyst Ave
Alta Loma, CA 91737
Address as listed in the CSLB record — the office of record, not a service-area claim.
Phone (CSLB record)(909) 244-6503
Contractor bond$25,000 — American Contractors Indemnity Company
Workers' comp (CSLB record)Exempt
Business typeSole Owner
License issuedJanuary 21, 2009
License expiresJanuary 31, 2027

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Data source: CSLB public records as of November 6, 2026. License status can change at any time — verify live at CSLB before signing a contract.